* In my experience, panikhidas are only served for departed Orthodox Christians. I'm sure there were some who perished during the twin tower, pentagon and aircraft wreck in Pennsylvania attacks; however it would be appropriate to list them by name at the service, not all so called victims of terrorism.
* The deacon looks to be a boy. There is a canonical age requirement for deacons (25) which he probably does not meet. I wonder which bishop ordained this young man? For what purpose? I also note he does even not have a beard, which is another canonical requirement (unshaven clergy).
* Usually monastic clergy wear only the epitrachilion when serving a panikhida. Archimandrite Zacchaeus is wearing his mitre and phelonion. I can't help but wonder if this is only for reasons of vanity.
Here is a photograph of Metropolitan Hilarion serving a panikhida: note he only wearing his klobuk and (small) ormphorion over his epitrachilion.
* Finally, I note the media seems to outnumber those attending the service as laity, and the media seems to be positioned for the best "photo opportunity".
Fregards,